Page 82 - New Medley 5 Semester 2
P. 82
Competencies
C-2.1, C-2.2, C-4.1,
1 Percentage and Average
C-4.2, C-4.3, C-5.1
Percentage
Look at the following advertisements.
Diwali
Dhamaka 10%
Discount
In our daily life, we come across the symbol % called per cent. The word
‘per cent’ is derived from Latin word per centum which means ‘per 100’
or ‘out of 100’.
In the given advertisements, we observe 40% off on the sale of shoes that means
`40 will be reduced in `100. 20% extra and 33% extra are respectively written on
a packet of biscuits and glucose. That means, 20 g more biscuits is given at per
100 g biscuits and 100 g + 33 g glucose is given against 100 g glucose.
Why Do We Need to Know About Percentage?
1. 6 out of 200 items made by a machine were defective.
How many items would be defective if only 100 items were made?
items.
2. 20 out of 500 eggs collected in a farm are defective.
If 100 eggs are collected how many would be defective? eggs.
3. In a term-test, Sohan scored 34 out of 50 marks. How many would
he have scored if the test was of 100 marks? marks.
80
